Albert ball



(No Model.)

A. BALL.-

GORE BREAKER FOR ANNULAR BOOK DRILLS. No. 366,914.

Patented July 19, 1.887.

WITNESSES:

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UNITED STATES ATENT OFFICE.

ALBERT-BALL, OF CLAREMONT, NEW HAMPSHIRE, ASSIGNOR TO II'IE SULLIVAN MACHINE COMPANY, OF SAME PLACE.

CORE-BREAKER FOR ANNULAR ROCK-DRILLS.

SPECIFICATION forming part of Letters Patent No. 366,914, dated July 19, 1887.

Application filed November 13, 1886. Serial No. 218,776. (No model.)

To all whom it may concern:

Be it known that I, ALBERT BALL, of Claremont, in the county of Sullivan and State of New Hampshire, have invented a new and In1- proved Core-Breaker for Annular Rock-Drills and I do hereby declare that the following is a full and exact description of the same, reference being bad to the accompanying drawings, and to the letters of reference marked thereon.

My invention relates to core breakers and lifters for prospecting or annular rock-boring drills; and my improvements are intended to break and secure the most perfect corc automatically and operate on the principle of keeping the core-breaking wedges away from the core until it is desired to break and remove the same.

My several devices for which Letters Patent numbered severally 315,887, 315,888, and 315,889 have been granted upon application made by me and the device for which I intend to make application simultaneously herewith are on the same principle, and I hereby disclaim in this application all that is shown in said Letters Patent and what is claimed in said other application to be filed herewith. In the patents and application aforesaid the wedges are brought into action by the use of a valve or equivalent mechanism operated by the engineer from without, while in thisinvention the action is automatic.

\Vhen commencing to drill, the wedges are held up and away from the core, either by means of a light spring-latch or by means of a temporary core made of rubber or some other suitable material, until the drilled core enters the wedge-driver, when the core itselfserves to hold up the same, all as will be more fully hereinafter described and claimed.

For the better comprehension of my invention reference should be had to the accompa nying drawings, wherein like letters refer to corresponding parts, and in which Figure 1 is a longitudinal section of a corelifter shell and drill-head embodying my improvements. Fig. 2 is an end View of a diamond-armed bit, showing a rubber substitute for the core. Fig. 3 is a top view of the wedge driver. Fig. 4 is a side elevation, partly in section,of the wedge-driver with one wedge attached thereto. Fig. 5 is a central vertical section of the core lifter shell and cutting-bit. Fig. 6 is a side elevation of thcjacket inclosing the wedgc-driver,and showing the springlatch attached thereto. Fig. 7 is a top View of the diamond-armed bit, showing the inclined slots for the wedges. Fig. 8 is an end view of thejacket. Fig. 9 is alongitudinal section of the core-lifter shell, including the eore-barrel and the jacket.

My device consists, essentially, offou r parts:

First, of a cylindrical piece which I call the wedge driver, E and D, Figs. 1, 3, 1-, 5, and 6, and which, when it is reached by the core, is designed to remain stationary there with. For part ofits length this wedgedriver is constructed of a sprin D, designed to clasp the core as the drill descends. The up= per part, E, is heavier and without spring,and has a serrated top and one or two grooves around the outside, as will be more fully hereinafter described.

Second, of aseries of independent wedges. F, Figs. 1, 4., and 5, suspended by means of their bent upper ends from one of the grooves K, Figs. 1, 5, and 6, on the outside of the wedge-driver, whereby they have free movement around the wedgedriver when the lat tcr is stationary. The wedges are preferably made stiff, with neither an outward nor an inward spring, and pass down through slots L, Fig. 9, of a jacket, G, into inclined slots L of the cutting-head, so as to have only longitudinal movement relative to the drill-rod and cutting-head.

'Ihird, ofa jacket or frame, G, Figs. 1, 5, 6, S,and 9, in which the wedged river is placed, and which has slots to receive the wedges. It

. is preferably made thelcngth of the unthreaded part of what is technically known as the shell, (or core-lifter shell A, Figs. 1, 5, and 9.) This shell is a short length of tubing between the end of the core-barrel H, Fig. 9, and the diamond-armed bit 13, Figs. 1, 2, 5, 7, and 9, made with a larger inside diameter than the same, so as to leave shoulders (see Figs. 1, 5, and 9) on the inside, both at its top and bottom. This jacket G turns with the drill-rod, and is held up together with the wedge-driver, by the wedges themselves, and

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is made longer than the wedge-driver to allow for the proper working of the wedges in break-' ing the core when it is desired to pull up.

Fourth, of devices to keep the wedge-driver up and to keep the wedges from contact with the core until the core shall reach the at'oresaid spring D in the wedge-driver and be grasped by it. These devices have to be antomatic, and either of the following can be used to make them so: .A temporary core made of rubber or other suitable material so constructed as to leave spaces for thefree passage of the water, and which,when placed inside the shell so as to rest on the top of the diamond-armed bit, is grasped by the wedgedriver spring D and holdsup the wedgedriver. As the drill advances,the core forces up this temporary core and assumes its function. It is obvious that a short piece of core previously taken out can be used instead of the rubber or other substitute. Or a latch consisting of a light spring, I, Figs. 5 and 6, is fastened at one end by a rivet, M, in one of the exterior recesses of the jacket, and its free end is forced into a groove, J, Figs. 4 and 5, out under and around the top end of the wedge-driver and'provided with an opening, N. This spring is latched by pressing it in the said groove through the opening N, and by slightly turning the jacket on the wedgedriver the spring is carried farther around in the groove, and the wedge-driver and the jacket G are thus temporarily locked together and prevented from separating longitudinally. This spring, when so latched,keeps the wedgedriver and wedges up and back from the core.

Before proceeding to dri1l,thc wedge-driver and its jacket are locked together, as hereinbefore described. When the core is long enough, it is grasped by the spring of the wedge-driver,and this prevents the latter from turning with the drill; but the wedges and the jacket continue to revolve with the drill around the wedge-driver until the spring I (which is attached to this jacket) is brought opposite the opening N in the groove J of the wedge-driver, when said spring, by reason of its outward pressure, frees itself from engagement with the latter. The function of this spring then ceases, and the wedges and the wedge-driver are free to act, so that when the dril1-rod is pulled up the wedges are made to firmly grasp the core.

The wedge-driver has preferably a serrated top, (see Figs. 3, 4t, 5, and 6,) to allow the free passage of the water, and the jacket is also provided with spaces for this purpose.

The wedges and the grooves in the jacket L, Fig. 9, which are occupied by the arms of the same, and the slots in the bit L, Figs. 7 and 9,in which the said wedges move, are so made that as the wedges are driven down they are at the same time forced inward and against the core, and when elevated they are held back from the same. This is accomplished by varying the depth of the grooves and the thickness of the wedges and wedge-arms.

The wedgesproper are at the end of short arms, which at the other (the top) end have projections which move in the recess K inthe top of the wedge-driver.

In matters of detail other equivalent devices could be substituted for some I have shown in mydrawings and description, and to which therefore I do not wish to be strictly confined. It will also be understood that this temporary coreis equally serviceable and valuable in other forms of core-lifters which are provided with a device for grasping the core.

Having thus described myinvention,whatI claim as new, and wish to secure by Letters Patent, is-

1. A corebreaking tool the breakingwedges whereof are automatically'kept away from contact with the core during the process of drilling by nieans of a temporary core or latch, but are brought into breaking contact therewith by the core itself when the drill-rod is pulled up, substantially as described.

2. In combination with a core-barrel and annular drillhead, the breaking wedges F and the wedge-driver around which thewedges are free to revolve, and which is adapted to grasp the core, substantially as and for the purpose described.

3. In combination with a core -barrel, an

intermediate shell, A, a wedge-driver,wedges free to act around the same, a jacket or frame provided with grooves, and an annular drillhead, also provided with grooves,su bstantiall y as and for the purposes described. 4. In combination with an annular drillhead and shell,a wedge-driver carrying wedges free to revolve around the same and a temporary core, 0, substantially as and for the purpose described.

5. In combination with a corebarrel, an annular drill-head, and an intermediate shell, a wedge-driver, wedges free to revolve around said driver, a jacket or frame within which the wedge-driverworks, and aspring-latch, I, substantially as and for the purpose described.

6. The combination, with an annular drillhead and shell and a core-lifting device provided with spring-clasps for holding the core, of a temporary core, substantially as and for the purposes set forth.

In testimony whereof I affix my signature in presence of two witnesses.

ALBERT BALL.

Vitnesses:

Gno. 0. BALL, 0. BELLE DUTTON. 

